Double-Elliptical Shaped Miniaturized Micro Strip Patch Antenna for Ultra-Wide Band Applications

Abstract

Greater design flexibility and newer miniaturization techniques are highly sought after by the commercial antenna industry and researchers. Micro-Strip Patch Antenna (MSPA) is finding huge applications in various fields of communication. In the present paper, the novel idea of Double-Elliptical Micro-strip Patch Antenna (DEMPA) is proposed for antenna miniaturization and higher design flexibility. Double-Elliptical Patch (DEP) is made as the combination of two half-elliptical patches having the same minor axis and different semi-major axes or the same major axis and different semi-minor axes. A DEP with different lengths of horizontally arranged semi-major axes and centrally given feed was considered here. The length of semi-major axis for right half-elliptical patch was varied while keeping the length of semi-major axis for left half-elliptical patch fixed. Design of DEMPA was carried out using Ansoft HFSS software, and the antenna has been fabricated and tested. The measured results were in good agreement with the simulated ones. The percentage reduction in effective patch area was found to be 8.33 for DEMPA compared to the corresponding elliptical patch antenna. The DEMPA covered the entire frequency range of Ultra Wide Band (UWB). With this novel shape, greater design flexibility along with miniaturization is achieved. The axial ratio analysis showed that the resulted antenna was of linear polarization.

Predicting Performance Characteristics of Double Elliptical Micro-Strip Patch Antenna for Radiolocation Applications Using Response Surface Methodology

“…For the fabricated antenna, the resonant frequency within the frequency band of 8.50 GHz-10.55 GHz and close to the solution frequency of 9.85 GHz was 9.00 GHz, and the corresponding value of RL was −33.86 dB [6]. This is found very close to the RL values from regression model and numerical model as given in Table 6.…”

“…Main effects and interaction effects of design parameters on RL were discussed. Predictive ability of the regression model obtained was confirmed with the help of two numerically modeled DEMPAs, and one among them had been fabricated whose details were reported in the authors' previous paper [6]. The simulated radiation characteristics of radiation pattern, peak gain curve, radiation efficiency curve, axial ratio curve, and distribution of surface currents of previously fabricated DEMPA were provided and discussed.…”

“…A DEMPA is made out of a DEP which is developed from a double ellipse. The double ellipse is a combination of two half-ellipses having either the common minor axis and different semi-major axes or the common major axis and different semi-minor axes [6]. A DEP is characterized in terms of its axis of symmetry and its orientation.…”

“…In order to validate the numerical as well as regression model, details of resonant frequency and RL measurement of a fabricated antenna were required. One of the aforesaid two DEMPA mah had been fabricated, tested, and its measurements reported in the authors' earlier paper [6]. The fabricated antenna was of serial number 1 in Table 6.…”

“…For a DEMPA with equal horizontal semi-major axes and unequal vertical semi-minor axes, the radiation properties were found similar to the corresponding EMPA even when the effective patch area was reduced by 10.714% [7]. For DEMPA with unequal horizontal semi-major axes and equal vertical semi-minor axes, the antenna characteristics were similar to the corresponding EMPA even when the effective patch area was reduced by 8.33% [6]. Antenna miniaturization in this order was achieved because of the increased design flexibility due to an additional degree of freedom in design.…”